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The single-season record for the lowest ERA is held by Dutch Leonard, who in 1914 had an earned run average of 0.96, pitching 224.2 innings with a win–loss record of 19–5. [2] The all-time record for the lowest single season earned run average by a pitcher pitching 300 or more innings is 1.12, set by Bob Gibson in 1968.
Both total runs and earned runs are tabulated as part of a pitcher's statistics, but earned runs are specially denoted because of their use in calculating a pitcher's earned run average (ERA), the number of earned runs allowed by the pitcher per nine innings pitched (i.e., averaged over a regulation game). Thus, in effect, the pitcher is held ...
During the early days of baseball history, this over correction for fielding errors caused pitchers on bad teams to be overrated in terms of ERA. [7] Removing unearned runs in calculating ERA may be useful if they are unrelated to pitcher performance, but Wright concludes that fielding errors are somewhat dependent on a pitcher's style.
ERA+ is calculated as: + = Where ERA is the pitcher's ERA, lgERA is the average ERA of the league, and PF is the park factor of the pitcher in question.. This formula is now standard, [1] although Baseball-Reference.com briefly used a different formula which took values strictly between 0 and 200 instead of between 0 and infinity, but the current website shows values above 200 so it is clearly ...
The traditional measure of pitching performance is the earned run average (ERA). It is calculated as earned runs allowed per nine innings. Earned run average does not separate the ability of the pitcher from the abilities of the fielders that he plays with. [16] Another classic measure for pitching is a pitcher's winning percentage. Winning ...
However, the values are calculated differently for pitchers and position players: position players are evaluated using statistics for fielding, base running, and hitting, while pitchers are evaluated using statistics related to the opposing batters' hits, walks, and strikeouts in FanGraphs' version and runs allowed per 9 innings with a team ...
DIP ERA is not as useful for knuckleballers and other "trick" pitchers, a factor that McCracken mentioned a few days after his original announcement of his research findings in 1999, in a posting on the rec.sport.baseball.analysis Usenet site on November 23, 1999, when he wrote: "Also to [note] is that, anecdotally, I believe pitchers with ...
Similarly, in 2004, Milwaukee Brewers starting pitcher Ben Sheets had a losing record of 12–14, despite displaying a league-best 8:1 strikeout-to-walk ratio and was among the top 5 pitchers in ERA (2.70) and WHIP (0.98). [8] In addition to their dependence on run support, wins for a starting pitcher are also dependent on bullpen support. A ...